It is the purpose of this paper to show that the major drainage features of the southeastern border of the Adirondacks have been well nigh revolutionized as a result of the presence and retreat of the Pleistocene ice-sheet. The region under discussion lies in Warren, Saratoga, and Fulton counties and is represented by the accompanying sketch map. For a proper understanding of the points involved the reader should consult the State geologic map and the following topographic sheets of the United States Geological Survey: North Creek, Bolton, Stony Creek, Luzerne, Glens Falls, Broadalbin, Saratoga, and Schuylerville.
The remarkable courses of the Hudson and Schroon rivers, as well as certain tributaries, have long been recognized. As stated by Kemp and Newland:2 “There is a peculiar tendency of the streams to leave the normal southerly courses and double back on themselves to the northeast again. . . . The Sacandaga makes . . .